Tk Built-In Commands tk_focusNext(1T)
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NAME
tk_focusNext, tk_focusPrev, tk_focusFollowsMouse - Utility
procedures for managing the input focus.SYNOPSIS
tk_focusNext window
tk_focusPrev window
tk_focusFollowsMouse
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DESCRIPTION
tk_focusNext is a utility procedure used for keyboard
traversal. It returns the ``next'' window after window in focus order. The focus order is determined by the stacking order of windows and the structure of the window hierarchy. Among siblings, the focus order is the same as the stacking order, with the lowest window being first. If a window haschildren, the window is visited first, followed by its chil-
dren (recursively), followed by its next sibling. Top-level
windows other than window are skipped, so that tk_focusNext
never returns a window in a different top-level from window.
After computing the next window, tk_focusNext examines the
window's -takefocus option to see whether it should be
skipped. If so, tk_focusNext continues on to the next win-
dow in the focus order, until it eventually finds a window that will accept the focus or returns back to window.tk_focusPrev is similar to tk_focusNext except that it
returns the window just before window in the focus order.tk_focusFollowsMouse changes the focus model for the appli-
cation to an implicit one where the window under the mouse gets the focus. After this procedure is called, whenever the mouse enters a window Tk will automatically give it the input focus. The focus command may be used to move the focus to a window other than the one under the mouse, but as soon as the mouse moves into a new window the focus willjump to that window. Note: at present there is no built-in
support for returning the application to an explicit focus model; to do this you'll have to write a script thatdeletes the bindings created by tk_focusFollowsMouse.
KEYWORDSfocus, keyboard traversal, top-level
Tk Last change: 4.0 1Tk Built-In Commands tk_focusNext(1T)
ATTRIBUTES
See attributes(5) for descriptions of the following attri-
butes:_______________________________________
| ATTRIBUTE TYPE | ATTRIBUTE VALUE|
|____________________|__________________|_
| Availability | runtime/tk-8 |
|____________________|__________________|_
| Interface Stability| Uncommitted ||____________________|_________________|
NOTES Source for Tk is available on http://opensolaris.org. Tk Last change: 4.0 2